This image is excerpted from a U.S. GAO report:
www.gao.gov/products/GAO-25-107037
Fusion Energy: Additional Planning Would Strengthen DOE's Efforts to Facilitate Commercialization
Notes: A spherical torus is an alternative magnetic confinement device that is shaped more like a cored apple than the donut-like shape of a conventional tokamak. The National Spherical Torus eXperiment-Upgrade has been under repair and upgrades since 2016. The photo was taken in fiscal year 2024.